scholarly journals Towards the Development of Novel Hybrid Composite Steel Pipes: Electrochemical Evaluation of Fiber-Reinforced Polymer Layered Steel against Corrosion

Polymers ◽  
2021 ◽  
Vol 13 (21) ◽  
pp. 3805
Author(s):  
Fatima Ghassan Alabtah ◽  
Elsadig Mahdi ◽  
Faysal Fayez Eliyan ◽  
Elsadig Eltai ◽  
Marwan Khraisheh
Keyword(s):  
Polymer Coating ◽  
Electrochemical Impedance ◽  
Distribution Networks ◽  
Fiber Reinforced Polymer ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Acid Attack ◽  
Steel Pipes ◽  
Reinforced Polymer ◽  
Wide Range

Corrosion remains one of the major and most costly challenges faced by the steel industry. Various fiber-reinforced polymer coating systems have been proposed to protect metallic piping distribution networks against corrosion. Despite increasing interest among scientific and industrial communities, there is only limited predictive capability for selecting the optimum composite system for a given corrosive condition. In this study, we present a comprehensive evaluation of the electrochemical behavior of two different fiber-reinforced polymer composite systems against the corrosion of carbon steel pipes under a wide range of acidic and corrosive solutions. The composites were made of glass and Kevlar fibers with an epoxy resin matrix and were subjected to corrosive solutions of 0.5 M NaCl, 0.5 M HCl, and 0.5 M H2SO4. The kinetics of the corrosion reactions were evaluated using potentiodynamic polarization (PDP) tests. In addition, electrochemical impedance spectroscopy (EIS) tests were carried out at open circuit potentials (OCPs). It was demonstrated that the glass fiber-reinforced polymer coating system offered the best protection against corrosion, with a high stability against deterioration when compared with epoxy and Kevlar fiber-reinforced polymer coating systems. Scanning electron microscopy images revealed cracks and deteriorated embedded fibers due to acid attack, sustained/assisted by the diffusion of the corrosion species.

Acousto-Ultrasonic Technology for Nondestructive Evaluation of Concrete Bridge Members Strengthened by Carbon Fiber–Reinforced Polymer

2005 ◽  
Vol 1928 (1) ◽  
pp. 245-251 ◽  
Author(s):  
Mahmut Ekenel ◽  
Nestore Galati ◽  
John J. Myers ◽  
Antonio Nanni ◽  
Valery Godínez
Keyword(s):  
Carbon Fiber ◽  
Nondestructive Testing ◽  
Fiber Reinforced Polymer ◽  
Carbon Fiber Reinforced Polymer ◽  
Ultrasonic Nondestructive Testing ◽  
Fiber Reinforced ◽  
Reinforced Polymer ◽  
Wide Range ◽  
Cfrp Sheet ◽  
Carbon Fiber Reinforced

Carbon fiber–reinforced polymer (CFRP) composites have been used in a wide range of application areas in bridge rehabilitations because these materials are less affected by corrosive environmental conditions, are known to provide longer life, and require less maintenance. However, the quality control and quality assessment of these new rehabilitation systems should be further improved and standardized. A recent rehabilitation project that used CFRP laminates was done on a bridge in Dallas County, Missouri, by the Missouri Department of Transportation and the Center for Infrastructure Engineering Studies at the University of Missouri–Rolla. The acousto-ultrasonic nondestructive testing technology was performed to detect and image surface defects in the form of delaminations. These were intentionally formed at the CFRP sheet–concrete interface to investigate the ability of this technique. Acousto-ultrasonic nondestructive testing has shown the ability to detect and image the delaminations between CFRP sheet and concrete substrate.

scholarly journals Water Absorption, Hydrothermal Expansion, and Thermomechanical Properties of a Vinylester Resin for Fiber-Reinforced Polymer Composites Subjected to Water or Alkaline Solution Immersion

Polymers ◽  
2019 ◽  
Vol 11 (3) ◽  
pp. 505 ◽  
Author(s):  
Xiaoli Yin ◽  
Yancong Liu ◽  
Yufei Miao ◽  
Guijun Xian
Keyword(s):  
Water Uptake ◽  
Alkaline Solution ◽  
Elevated Temperatures ◽  
Water Immersion ◽  
Thermomechanical Properties ◽  
Fiber Reinforced Polymer ◽  
Molecular Networks ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Reinforced Polymer

In the present paper, a vinyl ester (VE) resin, potentially used as a resin matrix for fiber-reinforced polymer (FRP) composite sucker rods in oil drilling, FRP bridge cables, or FRP marine structures, was investigated on its resistance to water and alkaline solution immersion in terms of water uptake, hydrothermal expansion, and mechanical properties. A two-stage diffusion model was applied to simulate the water uptake processes. Alkaline solution immersion led to a slightly higher mass loss (approx. 0.4%) compared to water immersion (approx. 0.23%) due to the hydrolysis and leaching of uncured small molecules (e.g., styrene). Water immersion caused the expansion of VE plates monitored with Fiber Bragg Grating (FBG). With the same water uptake, the expansion increased with immersion temperatures, which is attributed to the increased relaxation extent of the resin molecular networks. Although an obvious decrease of the glass transition temperatures (Tg) of VE due to water immersion (5.4 to 6.1 °C/1% water uptake), Tg can be recovered almost completely after drying. Tensile test results indicate that a short-term immersion (less than 6 months) enhances both the strength and elongation at break, while the extension of the immersion time degrades both the strength and elongation. The modulus of VE shows insensitive to the immersion even at elevated temperatures.

The Mechanical Property of Recycled Fiber Reinforced Polymer Composites by Superheated Steam

2013 ◽  
Vol 339 ◽  
pp. 687-690 ◽  
Author(s):  
Jian Shi ◽  
Jun Kato ◽  
Li Min Bao ◽  
Kiyoshi Kemmochi
Keyword(s):  
Superheated Steam ◽  
Weight Ratio ◽  
Fiber Reinforced Polymer ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Frp Composites ◽  
Reinforced Polymer ◽  
Fiber Reinforced Polymer Composites ◽  
Recycled Fiber ◽  
Reinforcement Fiber

Fiber Reinforced Polymer (FRP) composites are used in many applications for their excellent strength-to-weight ratio. These properties are significant barriers for achieving the 3R concept (Recycle, Reuse, and Reduce). Inverse manufacturing is a recent technology that produces new materials and industrial goods from FRP waste based on life-cycle assessment (LCA), and it is expected to help solve the problems of 3R associated with FRP [1-. However, no effective recycling system of FRP has been established because of the cross-linked structure of thermosetting resin matrix and inorganic reinforcement fibers. To investigate the possibility of recycling and reusing both matrix and reinforcements, a project of preventing environmental deterioration was performed. In this study, a new decomposition method for recycling FRP waste by superheated steam was developed. Separation of the resin matrix and reinforcement fiber from the FRP was attempted, the FRP recycled from the separated fibers was remolded; this is called R-FRP.

scholarly journals Experimentation on Mechanical Properties of Fiber Reinforced Polymer Composite Material

2020 ◽  
Vol 9 (3) ◽  
pp. 1028-1033
Keyword(s):  
Mechanical Properties ◽  
Composite Material ◽  
Glass Fiber ◽  
Testing Machine ◽  
Fiber Reinforced Polymer ◽  
Sisal Fiber ◽  
Fiber Reinforced ◽  
Abrasive Resistance ◽  
Reinforced Polymer ◽  
Wide Range

The naturally available material such as Sisal has been using in several applications in fabricating composite materials due to its exceptional durability with a minimum wear and tear and due to its ability to stretch. Using sisal fiber as reinforcement to form sisal fiber reinforced polymer composites, strengthen the study of mechanical properties of the composites. In this project, we have enhanced the mechanical properties of the sisal/glass fiber incorporated with polyurethane. Polyurethane is an extremely versatile elastomer used in countless applications worldwide. It has some excellent properties like high abrasive resistance, wide range of hardness, high load bearing capacity, wide resilience range, flexibility, strong bonding properties which makes it an ideal choice in the field of composite preparation. In this study, the composite material is fabricated by mixing Polyurethane proportionally with the sisal/glass fiber. After the fabrication is done, it is planned to study the mechanical properties of the composite material using different testing tools like Universal Testing Machine, Izod test, and hardness tester.

Temperature-Dependent Interfacial Debonding and Frictional Behavior of Fiber-Reinforced Polymer Composites

2019 ◽  
Vol 86 (9) ◽  
Author(s):  
Qiyang Li ◽  
Guodong Nian ◽  
Weiming Tao ◽  
Shaoxing Qu
Keyword(s):  
Linear Thermal Expansion ◽  
Fiber Reinforced Polymer ◽  
Frictional Stress ◽  
Material System ◽  
Fiber Reinforced ◽  
Interfacial Behavior ◽  
Temperature Dependent ◽  
Frictional Sliding ◽  
Reinforced Polymer ◽  
Wide Range

As fiber-reinforced polymer matrix composites are often cured from stress-free high temperature, when subjected to ambient temperature, both the mismatch of the coefficient of linear thermal expansion between the fiber and the matrix and the dependence of material properties on temperature will influence the interfacial behavior. Thus, it is necessary to provide an insight into the mechanism of temperature effects on the thermomechanical properties and behaviors along the interface. In this work, we conducted microbond tests of the glass fiber–epoxy material system at controlled testing temperature (Tt). A modified interface model is formulated and implemented to study the interfacial decohesion and frictional sliding behavior of microbond tests at different Tt. With proper cohesive parameters obtained, the model can predict temperature-dependent interfacial behaviors in fiber-reinforced composites. Both the slope of the peak force as well as the measured force at the stage of frictional sliding decrease with Tt in a wide range of the length of microdroplet-embedded fiber (le). The interfacial shear strength (IFSS) keeps almost constant at Tt ≤ 40 °C and decreases with le when temperature is above 40 °C. The average frictional stress (τfAverage) along the interface increases with le when temperature is below 80 °C but is almost constant when temperature is above or equal to 80 °C. Overall, in the same range of le, τfAverage is greater when Tt is at low temperature.

Durability Performances of Aramid Fiber Reinforced Polymer as Reinforcement Material for Concrete Structures in Cold Regions

2020 ◽  
Vol 853 ◽  
pp. 171-176
Author(s):  
Shuo Zhang ◽  
Chun Lin Liu ◽  
Wen Zhu ◽  
Meng Xiong Tang ◽  
He Song Hu ◽  
...  
Keyword(s):  
Tensile Strength ◽  
Elastic Modulus ◽  
Epoxy Resin ◽  
Aramid Fiber ◽  
Fiber Reinforced Polymer ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Freeze Thaw ◽  
Dry Air ◽  
Reinforced Polymer

A series of tests were conducted to investigate the mechanical performances of aramid fiber reinforced polymer (AFRP) and its epoxy resin matrix after 0, 20, 40, 60 and 80 freeze-thaw cycles in the dry air, respectively. After a given number of freeze-thaw cycles, the residual tensile strength and elastic modulus of AFRP specimens were measured, and the lap-shear strength of epoxy resin adhesive specimens was gained. Test results show that: (1) Variation of the elastic modulus of AFRP with the increasing of the freeze-thaw cycles exhibits the same tendency as the tensile strength did. They increase in the first 20 to 40 cycles and then decrease till the end of 80 cycles; (2) The tensile strength and elastic modulus of AFRP decreases by 5.1% and 8.2%, respectively, after 80 cycles as compared with that kept in the laboratory environments. However, the effect of the freeze-thaw cycling in the dry air on the tensile properties of CFRP is very limited within 80 cycles; (3) The freeze-thaw cycling in the dry air of this study has an adverse effect on the adhesive property of the epoxy resin, which could be regarded as the evidence for the degradation of the interface between aramid/carbon fiber and matrix.

scholarly journals Durability of basalt fiber-reinforced polymer bars in wet-dry cycles alkali-salt corrosion

2019 ◽  
Vol 26 (1) ◽  
pp. 43-52
Author(s):  
Jianxun Liu ◽  
Ning Li ◽  
Meirong Chen ◽  
Jianping Yang ◽  
Biao Long ◽  
...  
Keyword(s):  
Basalt Fiber ◽  
Offshore Structures ◽  
Salt Resistance ◽  
Fiber Reinforced Polymer ◽  
Time Shift ◽  
Resin Matrix ◽  
Fiber Reinforced ◽  
Alkali Salt ◽  
Reinforced Polymer ◽  
Basalt Fiber Reinforced Polymer

AbstractBasalt fiber-reinforced polymer (BFRP) bars have been increasingly applied to offshore structures, which are subjected to seawater corrosion and wet-dry cycles during their service time. This study evaluated the alkali-salt resistance performance of BFRP bars with different resin matrix types under wet-dry cycles. The tensile and shear strength of BFRP bars were tested. As a comparison, experiments of BFRP bars under continuous immersion were also conducted. The mechanisms of the two different conditions were analyzed by scanning electron microscopy (SEM). A relationship was established between the degradations under continuous immersion and wet-dry cycling. The results demonstrated that the alkali-salt resistance of vinyl resin matrix BFRP bars was superior to that of epoxy resin matrix BFRP bars under wet-dry cycles. Furthermore, according to the data obtained under continuous immersion, a time shift factor for predicting the durability of BFRP bars under wet-dry cycles was proposed.

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